/**
 * Created by PanJiaChen on 16/11/18.
 */

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string | null}
 */
export function parseTime(time, cFormat) {
  if (arguments.length === 0) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string') && (/^[0-9]+$/.test(time))) {
      time = parseInt(time)
    }
    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{([ymdhisa])+}/g, (result, key) => {
    const value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value ] }
    return value.toString().padStart(2, '0')
  })
  return time_str
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime(time, option) {
  if (('' + time).length === 10) {
    time = parseInt(time) * 1000
  } else {
    time = +time
  }
  const d = new Date(time)
  const now = Date.now()

  const diff = (now - d) / 1000

  if (diff < 30) {
    return '刚刚'
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + '分钟前'
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + '小时前'
  } else if (diff < 3600 * 24 * 2) {
    return '1天前'
  }
  if (option) {
    return parseTime(time, option)
  } else {
    return (
      d.getMonth() +
      1 +
      '月' +
      d.getDate() +
      '日' +
      d.getHours() +
      '时' +
      d.getMinutes() +
      '分'
    )
  }
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj(url) {
  const search = url.split('?')[1]
  if (!search) {
    return {}
  }
  return JSON.parse(
    '{"' +
      decodeURIComponent(search)
        .replace(/"/g, '\\"')
        .replace(/&/g, '","')
        .replace(/=/g, '":"')
        .replace(/\+/g, ' ') +
      '"}'
  )
}

/**
 * 数字格式化
 * @param number 数字
 * @param decimal 小数位数
 * @param dec_sep 小数分隔符
 * @param thousands_sep 千分位分隔符
 * @returns {string}
 */
export function formatNumber(number, decimal, dec_sep, thousands_sep) {
  number = (number + '').replace(/[^0-9+-Ee.]/g, '')
  // 数字
  const n = !isFinite(+number) ? 0 : +number
  // 保留小数位数
  const p = !isFinite(+decimal) ? 0 : Math.abs(decimal)

  // 千分位分隔符
  const t = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep
  // 小数分隔符
  const d = (typeof dec_sep === 'undefined') ? '.' : dec_sep

  // 执行保留小数
  const toFixedFix = function(n, p) {
    return n.toString().replace(new RegExp(`^(.*\\..{${p}}).*$`), '$1')
  }
  const s = (p ? toFixedFix(n, p) : '' + Math.round(n)).split('.')

  // 执行千分位分割
  const re = /(-?\d+)(\d{3})/
  if (t) {
    while (re.test(s[0])) {
      s[0] = s[0].replace(re, '$1' + t + '$2')
    }
  }
  if ((s[1] || '').length < p) {
    s[1] = s[1] || ''
    s[1] += new Array(p - s[1].length + 1).join('0')
  }
  return s.join(d)
}


